Ansible:只有在带有特定标记的情况下才运行play

Question

使用Ansible ansible 2.4.2.0，我只想从主剧本(main.yml)中运行一个特定的剧本

---
# main playbook for cluster deployment

  # initial configuration of OS same for all hosts
- name: Cluster Deployer playbook
  hosts: all
  roles:
    - { role: common, tags: ['initial_config'] }


  # configuration specific for loadbalancers hosts group
- name: Cluster Deployer playbook - Load Balancer setup
  hosts: loadbalancers
  roles:
    - { role: loadbalancers_setup, tags: ['setup_loadbalancer'] }

  # configuration specific for db-servers hosts group
- name: Cluster Deployer playbook - Database servers setup
  hosts: db-servers
  roles:
   - { role: db_servers_setup, tags: ['setup_db_server'] }

  # configuration specific for web-servers hosts group
- name: Cluster Deployer playbook - Web Servers setup
  hosts: web-servers
  roles:
   - { role: web_servers_setup, tags: ['setup_web_server'] }

这是我的hosts文件

[loadbalancers]
192.168.99.10

[db-servers]
192.168.99.2

[web-servers]
192.168.99.3
192.168.99.4

我用命令打电话给剧本

ansible-playbook main.yml --inventory hosts --tags initial_config

问题是，尽管我只要求在initial_config部分中使用标记roles，但Ansible会运行该剧本中的所有游戏。我尝试过将tags部分设置为hosts，但没有成功。

是否可以在此级别上定义标记，而不需要在角色中标记单个任务？我对Ansible很陌生，所以如果有更好的方法来写剧本，我会全神贯注地听。

Answer 1

“标记”指令在代码中放错了位置。

您的代码应该如下所示：

---
# main playbook for cluster deployment

  # initial configuration of OS same for all hosts
- name: Cluster Deployer playbook
  hosts: all
  roles:
    - common
  tags: 
    - initial_config

  # configuration specific for loadbalancers hosts group
- name: Cluster Deployer playbook - Load Balancer setup
  hosts: loadbalancers
  roles:
    - loadbalancers_setup
  tags: 
    - setup_loadbalancer

  # configuration specific for db-servers hosts group
- name: Cluster Deployer playbook - Database servers setup
  hosts: db-servers
  roles:
    - db_servers_setup
  tags: 
    - setup_db_server

  # configuration specific for web-servers hosts group
- name: Cluster Deployer playbook - Web Servers setup
  hosts: web-servers
  roles:
    - web_servers_setup
  tags:
    - setup_web_server

您的ansible命令应该如下所示：

ansible-playbook main.yml --inventory hosts --tags "initial_config"

有关更多信息，请查看的官方文件。

Answer 2

看起来您对标记继承有误解：

标记继承--您可以将标记应用于不仅仅是任务，但它们只影响任务本身。在其他地方应用标记只是一种方便，所以您不必在每项任务上都编写它。标签继承的不可用文档

试着做这样的事情：

- name: Cluster Deployer playbook
  hosts: all
  tasks:
    - include_role:
        name: common
      tags:
       - inital_config